EP3840143A1 - Electrical box to be fitted projecting from a support - Google Patents

Abstract

The invention relates to an electrical box made of rigid plastic material comprising a bottom wall (102) intended to be fixed to a receiving support, this bottom wall having on an external face (102B) at least one bearing zone ( 120) on said receiving support and being crossed by at least one duct (150) intended to receive an element for fixing to said receiving support, each duct having at an outer end (152), a pressure surface (155) on said receiving medium.

According to the invention, the electrical box comprises at least one casing (180) of flexible material surrounding each conduit so that the casing is interposed between said bottom wall and said conduit to allow a relative translational movement of the surface of pressure of each duct relative to each bearing zone of the bottom wall, without generating any mechanical stress deforming said bottom wall.

Description

The present invention relates generally to the field of electrical boxes, in particular insulating electrical boxes intended to house electrical mechanisms (typically, outlet or switch mechanisms).

It relates in particular to electrical boxes to be attached projecting on receiving supports, such as wall walls.

It relates more precisely to an electrical box made of rigid plastic material comprising a bottom wall intended to be fixed to a receiving support, this bottom wall having on an external face at least one bearing zone on said receiving support and being through at least one duct intended to receive an element for fixing to said receiving support, each duct having, at an outer end, a pressure surface on said receiving support. The pressure surface of the duct refers to the surface by means of which the duct bears against the receiving support.

The invention finds a particularly advantageous application in sealed electrical boxes.

There is already on the market an electrical box as mentioned above, to be fixed projecting on a receiving support, said electrical box having at least two distinct points of contact with the receiving support: the bearing zone and the pressure surface. of the conduit. Such a box is for example described in the document FR2988148 . To fix such an electrical box on the support, provision is generally made to screw two fixing screws through two conduits passing through the bottom wall, into the support, so that the electrical box then has at least three contact points. separate with the receiving support: the bearing zone and the pressure surface of each of the two ducts.

Due to the flatness defects of the support on which the electrical box is fixed, and the number of distinct contact points at which the box rests against the support, it frequently happens that the bottom wall of such a box is deformed by the force exerted by the screw screwed into the duct and the support. Such a deformation of the bottom wall is generally undesirable because it weakens the box and can cause problems with the mechanism integrated therein as well as sealing problems in the case of sealed electrical boxes.

In order to remedy the aforementioned drawback of the state of the art, the present invention provides an electrical box in which the duct is separated from the bottom wall so that it is only to undergo the force exerted by the fixing element fixed in this duct and in the receiving support.

More particularly, there is provided according to the invention an electrical box according to claim 1.

Thus, in the electrical box according to the invention, the duct remains mechanically linked to the bottom wall by means of the flexible envelope, said flexible envelope allowing, where appropriate, the relative movement of said duct with respect to the wall. bottom, so that when fixing the electrical box, the support of the pressure surface of the duct is separated from the support of the support zone of the bottom wall. This system for compensating for flatness defects in the receiving support prevents deformation of the bottom wall and, more generally, of the entire electrical box, and guarantees better sealing thereof. In other words, the relative translational movement of the pressure surface of each duct relative to each bearing zone of the bottom wall avoids deforming the bottom wall of the electrical box when said bottom wall comes into contact with the bottom wall. receiving support at several distinct contact points (the bearing zone and the pressure surface of each duct) at which said receiving support does not have the same depth.

Other non-limiting and advantageous characteristics of the electrical box according to the invention, taken individually or in any technically possible combination, are given in sub-claims 2 to 14.

The invention also relates to a housing according to claim 15.

Finally, the invention relates to an electrical device according to claim 16.

Of course, the different characteristics, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive.

• la figure 1 est une représentation schématique en vue avant de la platine-support d'une boîte électrique conforme à un premier mode de réalisation de l'invention ;
• la figure 2 est une représentation schématique en vue arrière de la platine-support de la figure 1;
• la figure 3 est une représentation schématique en coupe de la platine-support de la figure 1 ;
• la figure 4 est un schéma de principe, en coupe, de la paroi de fond d'une boîte électrique selon l'invention fixée sur un support de réception présentant un défaut de surface « en bosse » ;
• la figure 5 est un schéma de principe, en coupe, de la paroi de fond de la figure 4 fixée sur un support de réception présentant un défaut de surface « en creux » ;
• la figure 6 est une représentation schématique vue en arraché d'une partie de la platine-support de la figure 1 après une première étape d'un premier procédé de fabrication de cette platine-support ;
• la figure 7 est une représentation schématique vue en arraché de la partie de la platine-support représentée sur la figure 6 après une deuxième étape du premier procédé de fabrication ;
• la figure 8 est une représentation schématique vue en arraché illustrant la mobilité de la partie de la platine-support représentée sur la figure 7 ;
• la figure 9 est une représentation schématique, vue en arraché, d'une partie de la platine-support de la figure 1 après une première étape d'un deuxième procédé de fabrication de cette platine-support ;
• la figure 10 est une représentation schématique, vue en arraché, de la partie de platine-support représentée sur la figure 9 après une deuxième étape du deuxième procédé de fabrication ;
• la figure 11 est une représentation schématique en perspective d'un socle de platine-support d'une boîte électrique conforme à un deuxième mode de réalisation de l'invention ;
• la figure 12 est une représentation schématique en perspective zoomée de la zone Z de la figure 11;
• la figure 13 est une représentation schématique en perspective d'un conduit de platine-support destiné à être assemblé avec le socle de la figure 11 ;
• la figure 14 est une représentation schématique vue en coupe du conduit de la figure 13 assemblé avec le socle de la figure 11 et dont l'extrémité interne est fermée par un bouchon de protection ;
• la figure 15 est une représentation schématique en perspective éclatée d'une portion de platine-support d'une boîte électrique conforme à un troisième mode de réalisation de l'invention ;
• la figure 16 est une représentation schématique en perspective éclatée d'une portion de platine-support d'une boîte électrique conforme à un quatrième mode de réalisation de l'invention ;
• la figure 17 est une représentation schématique en coupe de la portion de platine-support assemblée de la figure 16 ;
• la figure 18 est une représentation schématique en perspective éclatée, vue en arraché, d'une portion de platine-support d'une boîte électrique conforme à un cinquième mode de réalisation de l'invention ;
• la figure 19 est une représentation schématique en coupe de la portion de platine-support assemblée de la figure 18 ;
• la figure 20 est une vue schématique en perspective éclatée d'un appareillage électrique comportant une boîte électrique conforme au premier mode de réalisation de l'invention, un mécanisme de prise de courant et un enjoliveur associé ; et,
• la figure 21 est une vue schématique en perspective éclatée d'un appareillage électrique comportant une boîte électrique conforme au premier mode de réalisation de l'invention, un mécanisme d'interrupteur et un enjoliveur associé.

The description which will follow with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be implemented. In the accompanying drawings:

• the figure 1 is a schematic representation in front view of the support plate of an electrical box according to a first embodiment of the invention;
• the figure 2 is a schematic rear view of the support plate of the figure 1 ;
• the figure 3 is a schematic sectional representation of the support plate of the figure 1 ;
• the figure 4 is a block diagram, in section, of the bottom wall of an electrical box according to the invention fixed to a receiving support having a “bump” surface defect;
• the figure 5 is a block diagram, in section, of the bottom wall of the figure 4 attached to a receiving support having a "hollow" surface defect;
• the figure 6 is a schematic representation, cut away, of part of the support plate of the figure 1 after a first step of a first method of manufacturing this support plate;
• the figure 7 is a schematic representation cut away of the part of the support plate shown on the figure 6 after a second step of the first manufacturing process;
• the figure 8 is a schematic cutaway view illustrating the mobility of the part of the support plate shown in the figure. figure 7 ;
• the figure 9 is a schematic representation, cut away view, of part of the support plate of the figure 1 after a first step of a second process for manufacturing this support plate;
• the figure 10 is a schematic representation, cut away, of the part of the support plate shown on the figure 9 after a second step of the second manufacturing process;
• the figure 11 is a schematic perspective representation of a base plate-support of an electrical box according to a second embodiment of the invention;
• the figure 12 is a schematic zoomed perspective representation of the Z zone of the figure 11 ;
• the figure 13 is a schematic perspective representation of a support plate duct intended to be assembled with the base of the figure 11 ;
• the figure 14 is a schematic cross-sectional representation of the duct of the figure 13 assembled with the base of the figure 11 and the inner end of which is closed by a protective cap;
• the figure 15 is a schematic exploded perspective representation of a portion of a support plate of an electrical box according to a third embodiment of the invention;
• the figure 16 is a schematic exploded perspective representation of a portion of a support plate of an electrical box according to a fourth embodiment of the invention;
• the figure 17 is a schematic cross-sectional representation of the assembled support plate portion of the figure 16 ;
• the figure 18 is a schematic representation in exploded perspective, cut away view, of a portion of the support plate of an electrical box according to a fifth embodiment of the invention;
• the figure 19 is a schematic cross-sectional representation of the assembled support plate portion of the figure 18 ;
• the figure 20 is a schematic exploded perspective view of an electrical apparatus comprising an electrical box in accordance with the first embodiment of the invention, a socket mechanism and an associated cover; and,
• the figure 21 is a schematic exploded perspective view of an electrical apparatus comprising an electrical box according to the first embodiment of the invention, a switch mechanism and an associated cover.

As a preliminary, it will be noted that the identical or similar elements of the various embodiments of the invention shown in the various figures will, as far as possible, be referenced by the same reference signs and will not be described each time.

By convention, the terms “front” and “rear” are used with respect to the direction of the user's gaze turned towards the electrical box attached to the receiving support. Thus, the front of an element designates the side of this element that is facing the user, while the rear designates the opposite side. In other words, when the receiving bracket of the electrical box is the wall wall of a room, the front of an element designates the side of that element facing the interior of the room and the rear designates the side of the room. this element facing the wall. The terms “interior” (or “internal”) and “exterior” (or “external”) are used in relation to the electrical box itself, to designate respectively the side of an element facing the center of the unit. the electrical box and the side of an element facing the outside of this box.

We have represented on the figures 20 and 21 an electrical box 1000 according to the invention, which is here a sealed electrical box to be attached projecting on a receiving support 1 (shown in figures 4 and 5 ), for example on a wall, a bracket or any other support. The electrical box 1000 is here arranged to internally receive an electrical equipment mechanism such as a 3A socket mechanism ( figure 20 ) or a 3B switch mechanism ( figure 21 ), or a detection mechanism (not shown). Provision is made to attach to the front of this electrical box a cover 4A, 4B which closes the electrical box 1000 and whose shape is associated with the switchgear mechanism 3A, 3B mounted in the electrical box 1000.

The electrical box 1000 according to the invention is made of insulating plastic, for example by molding the various parts constituting it. The terms “material” and “material” are synonymous and used interchangeably in the remainder of the description.

As the figures 20 and 21 , the electrical box 1000 according to the invention here has a body which comprises on the one hand, a rear part formed by a support plate 10, and, on the other hand, a front part which is conventionally presented here in the form of a 'a frame 20 intended to be attached to this support plate 10. The frame 20 of the body of the electrical box 1000 attached to the support plate 10 forms an extension to the latter.

As the figures 20 and 21 , the front edge of the support plate 10 of the electrical box 1000 here has the shape of a groove 103 (see also figures 1 and 3 ) intended to receive by interlocking a corresponding tongue 203 formed on the rear edge of the frame 20 of the body of the electrical box 1000. Once the frame 20 and the support plate 10 nested one on the other, the side wall 201 of the frame 20 extends in the extension of the side wall 101 of the support plate 10. For fixing the frame 20 on the support plate 10, said support plate 10 also comprises, in each of its angles, means of attachment 110 to frame 20 (see also figure 1 ), and the frame 20 comprises complementary attachment means 210 (see figures 20 and 21 ).

As the figures 20 and 21 , both the front edge of the side wall 101 of the support plate 10 receiving the frame 20 and the rear edge of the frame 20, are each interrupted, on two opposite sides, by recesses 105, 205 intended to receive two end pieces 30 cable entry for the passage of an ICTA type electrical sheath or an IRL type tube or else an electrical cable bringing electrical wires inside the electrical box 1000 for the power supply of the gear mechanism 3A, 3B housed therein.

The support plate 10 of the electrical box 1000 is more precisely designed to, on the one hand, be fixed to the reception support 1 via specific holes 106 (see figures 1 , 20 and 21 ), and, on the other hand, support the fitting mechanism 3A, 3B via mounting means 108 (see figures 1 , 20 and 21 ). There is also provided, in the bottom wall of the support plate 10, a central opening 104, here closed by a tear-off sealing cap (see figures 1, 2 , 20 and 21 ). This central opening 104 is also intended for the possible passage of an electrical sheath of ICTA type or of an IRL type tube or even of an electrical cable (for example of the U1000RO2V or HO7RNF type) bringing electrical wires inside. of the electrical box 1000 for supplying the switchgear mechanism 3A, 3B which is housed therein.

As the figures 20 and 21 , the frame 20 has, for its part, both a function of protecting the equipment mechanism 3A, 3B and a function of supporting the trim 4A, 4B. More precisely, the frame 20 is designed to be closed at the front by the trim 4A, 4B. Thus, the body of the electrical box 1000 formed by the support plate 10 raised by the frame 20, is closed at the front by the cover 4A, 4B so as to form an electrical box.

The hubcap 4A, 4B comprises interface means 41, 42, 43 allowing the user to interact with the fitting mechanism 3A, 3B.

So on the figure 20 , the hubcap 4A comprises, inside a structural part 40 in the form of a frame, a well 41 for receiving an electrical plug. It also carries a hinged cover 42 for protecting the well 41.

On the figure 21 , the hubcap 4B for its part comprises a control button 43 adapted to snap onto receiving means 44 provided on a wall 45 which closes the structural part 40 in the form of a frame. These reception means 44 are provided to offer the control key 43 a tilting mobility. It is observed here that the wall 45 has two oblong windows closed by rigid plates 46 which are connected to the edges of these oblong windows by flexible sealing membranes. These rigid plates 46 are thus adapted to tilt relative to the wall 45 when the studs provided at the rear of the control button 43 come to press on it, which allows them to in turn tilt the coaches 36 of the mechanism. switch 3B. Thus, the switch mechanism 3B can switch by tilting the control key 43.

Of course, according to another embodiment, not shown, of the electrical box according to the invention, provision could be made for the latter not to consist of two parts (rear and front) assembled together, but to include conventionally, in a single part, a bottom wall from which rises a side wall generally perpendicular to the plane of said bottom wall. The hubcap would then be attached to the front of the side wall to close the electrical box and form the electrical box.

On the figures 1 , 11 , 15, 16 and 18 , there is shown all or part of the support plate 10 of five embodiments of an electrical box according to the invention, said five embodiments of the electrical box differing from one another by their respective support plate 10.

The support plate 10 associated with the first embodiment of the electrical box according to the invention is described in detail with reference to the figures 1 to 3 , as well as with reference to the schematic diagrams of figures 4 and 5 . The support plate 10 of the other embodiments of the box electric according to the invention is described with reference to figures 11 to 19 , by explaining the differences with this first embodiment and the other successive embodiments.

According to the first embodiment of the electrical box according to the invention, shown in figure 1 , the support plate 10 comprises a base 100, at least one duct 150 passing through a bottom wall 102 of this base 100 and internally delimiting one of said specific orifices 106 serving for fixing the electrical box on the support, as well as a envelope 180 of flexible material interposed between said bottom wall 102 of the base 100 and the duct 150.

It is understood here that the bottom wall 102 of the base 100 of the support plate 10 constitutes the bottom wall of the electrical box according to the invention, by which it will rest on the reception support 1 and be fixed to this support. Thus, in the remainder of the description, the reference 102 denotes the bottom wall of the base, the bottom wall of the support plate or the bottom wall of the electrical box.

Remarkably, as will be explained in more detail below, the envelope 180 of flexible material allows a relative movement between each duct 150 and the bottom wall 102 of the base 100 so that an external pressure surface 155 of the duct 150 is allowed to translate relative to a bearing zone 120 provided on an external face 102B of the bottom wall 102 of the base 100, without generating any mechanical stress deforming said bottom wall 102 (see figure 3 ).

The base 100 is presented here in a general parallelepipedal shape (see figures 1 and 2 ). Of course, this base could have a different shape, in particular cylindrical. The base 100 is open at the front, and comprises the bottom wall 102, generally square, bordered by a side wall 101 which rises from this bottom wall 102, substantially perpendicular thereto (see figures 1 and 2 ). The side wall 101 also follows a generally square contour (see figure 1 ). The base 100 is here made of rigid plastic, for example by molding.

The bearing zone 120 of the bottom wall 102 of the base 100 is provided on the outer face 102B of said bottom wall 102 (see figure 2 ). This bearing zone 120 is intended to come against the surface of the receiving support 1 when the electrical box is fixed thereto (see figures 4 and 5 ). As more specifically shown in the figure 2 , a bearing zone 120 is provided in each of the angles of the outer face 102B of the bottom wall 102. Each bearing zone 120 is formed by a relief, here in the form of an inclined ramp, arranged along a diagonal of the square of the bottom wall 102. Each ramp is inclined towards the center of the bottom wall 102, the peripheral portion of each ramp projecting rearwardly relative to the central portion of the ramp . This form of ramp allows the base 100 to be able to follow curved receiving surfaces. Here, it is the projecting peripheral portion of each ramp which forms each support zone 120. The support zones 120 make it possible to locate the contacts between the bottom wall 102 and the surface of the receiving support 1. The four support zones 120 distributed over the outer face 102B of the bottom wall 102 here ensure the stability of the electrical box fixed to said receiving support 1. As a variant, each support zone could be formed by any relief provided on the external face of the base wall of the base, this any relief being preferably interposed between two bearing surfaces of the conduits, more preferably symmetrically with respect to the center of the base wall.

As the figures 1 to 5 , said at least one duct 150 passing through the bottom wall 102 of the base 100 internally delimits one of said specific orifices 106 dedicated to fixing the support plate 10 of the electrical box to the receiving support 1. This duct 150 is intended to accommodate a fixing element, for example a fixing screw 2, for fixing the support plate 10 on the receiving support 1. The duct 150 is here made of rigid plastic, for example by molding. Conventionally, the internal end 151 of this duct 150 is here flared and internally defines a housing intended to receive the screw head (see figure 3 ). This housing is dimensioned to withstand the pressure forces exerted by said screw head when tightening the fixing screw 2 in the receiving support 1. The duct 150 thus acts as a clamping spacer between the fixing screw 2 and the receiving medium 1.

Preferably, the bottom wall 102 of the base 100 comprises at least two conduits 150 arranged symmetrically with respect to the center of said bottom wall 102, so that the electrical box fixed to the receiving support 1 by these two conduits 150 is more stable than when it is only fixed by a single duct 150. Here, as shown in the figures 1 and 2 , the bottom wall 102 of the base 100 is more precisely crossed by four conduits 150 arranged symmetrically with respect to the center of the bottom wall 102 of the electrical box. Each duct 150 internally delimits a specific orifice 106 for fixing the electrical box. The electrical box, generally fixed by only two of these conduits 150 chosen to be symmetrical with respect to the center of the bottom wall 102, thus presents more possibilities for fixing to the receiving support 1, without this fixing imposing a particular orientation on it.

As shown in the figure 1 , each of the two conduits 150 opposite with respect to the center of the bottom wall 102 internally delimits one of the specific orifices 106 of oblong section, the main directions of these oblong sections being oriented at 90 ° to one another. This This configuration makes it possible to compensate for any incorrect positioning of the holes made in the receiving support 1 and intended to receive the fixing screws 2.

As the figures 3 to 5 , the pressure surface 155 of each duct 150 is provided at an external end 152 of said duct 150, located on the side of the external face 102B of the bottom wall 102. This pressure surface 155 here has an annular shape, the external contour of which is circular and the internal outline is oblong. The pressure surface 155 is intended to come to rest against the surface of the receiving support 1 when tightening the fixing screw 2 introduced into the duct 150 and into the corresponding hole of the receiving support 1 (see figures 4 and 5 ). As will be detailed next, the support of the pressure surface 155 against the fixing support can be direct or indirect depending on whether or not an element is interposed between the support and said pressure surface 155. The pressure surface 155 of each duct 150 is separate from each bearing zone 120 of the bottom wall 102 of the base 100 of the support plate 10.

Here, each duct 150 is surrounded by its own flexible envelope 180, so that the movements of the ducts 150 are all independent of each other.

As shown in the figure 5 , under the tightening force of the fixing screw 2 in the receiving support 1, via the corresponding duct 150, the flexible envelope 180 surrounding said duct 150 can be deformed, if necessary, to allow the pressure surface 155 of said duct 150 to come to bear against the corresponding surface of the receiving support 1, without deforming the bottom wall 102 and while ensuring that the bearing zones 120 of the outer face 102B of said bottom wall 102 are themselves- even resting against a corresponding surface of the receiving support 1. In other words, the flexible envelope 180 guarantees that the tightening stresses exerted by the fixing screw 2 in the receiving support 1 are located at the level of the conduits 150 of the plate -support 10 of the electrical box and are not transmitted to the entire base 100 of said support plate 10. The flexible envelope 180, adapted to deform under this stress, in particular to compress, is particularly useful e to compensate for the flatness defects of the receiving support 1 called "hollow", that is to say when the pressure surface 155 of the duct 150 is disposed opposite a hollow of the receiving support 1 while the bearing zone 120 of the bottom wall 102 is arranged opposite a bump ( figure 5 ).

The bottom wall 102 of the electrical box according to the invention can thus adapt to the deformations of the receiving support 1 without causing deformation of this box, which here guarantees better assembly of the frame on the support plate 10. This improves the resistance of the electrical box and, in this case, its tightness.

As shown in the figure 3 , before fixing the electrical box on the receiving support 1, the pressure surface 155 of each duct 150 is here advantageously located set back from each bearing zone 120 of the external face 102B of the bottom wall 102 of the base 100. In other words, the pressure surface 155 of each duct 150 is located forward with respect to the bearing zones 120 of the bottom wall 102, such that when the electrical box rests on a flat surface, without being attached to the latter, only the bearing zones 120 of the bottom wall 102 are in contact with said flat surface, the pressure surface 155 of each duct 150 remaining at a distance from said flat surface. As shown in the figure 4 , this advantageous configuration makes it possible to compensate for certain flatness defects of the receiving support 1, in particular “bump” defects, without constraining the flexible envelope 180. Thus, when the pressure surface 155 of the duct 150 is placed opposite a bump in the fixing support 1, and when the bearing zone 120 of the bottom wall 102 is placed opposite a hollow in this support reception 1, fixing the fixing screw 2 in the corresponding hole of the reception support 1 is carried out without requesting any deformation of the flexible envelope 180 (see figure 4 ).

Of course, it is possible to adjust the gap materializing the shrinkage between the pressure surface 155 of each duct 150 and each bearing zone 120 of the bottom wall 102, as a function of the flatness defects of the receiving support 1. that the electrical box must be able to compensate.

According to the first embodiment of the electrical box according to the invention, each casing 180 of the support plate 10 is molded onto the corresponding conduit 150 and the bottom wall 102 of the base 100. Here, each conduit 150 and the wall 102 of the base 100 of the support plate 10 are moreover from the same molding operation, for example a two-material molding.

The figures 6 to 10 illustrate more precisely different steps of two methods of manufacturing the electrical box according to the invention, and more particularly the support plate 10 of this electrical box, the frame of the electrical box being molded separately. In these two manufacturing processes, during a first step, shown respectively on the figures 6 and 9 , each conduit 150 and the base 100 of the support plate 10 of the electrical box are molded jointly in the same rigid plastic material, from a single manufacturing mold.

More precisely, in the first step of the first manufacturing process, shown in figure 6 , the location of each duct 150 in the mold is such that the internal end 151 of this duct 150 is located in its final position, forward with respect to the lowest portion of the internal face of the bottom wall 102 of the base 100. On the contrary, in the first step of the second molding process, shown in figure 9 , the location of each duct 150 in the mold is such that its internal end 151 is located at the same level as the lower portion of the internal face of the bottom wall 102 of the base 100. The molding operation is facilitated. in this second manufacturing process because the injected plastic material can flow more easily into the mold to fill the location of the duct.

In both cases, at the end of the first molding step, there is a physical link 156 between the base 100 and the duct 150, this physical link 156 attesting to the presence of a channel in the mold used, through which the plastic material may have reached the location of the duct (see figures 6 and 9 ).

In a second step of the two manufacturing processes, shown on the figures 7 and 10 , each envelope 180 is molded between the corresponding duct 150 and the base 100.

Here, each flexible envelope 180 surrounding each duct 150 is made of an elastomeric material of the thermoplastic type such as SEBS (acronym for Styrene Ethylbutylene Styrene). This material, coupled with the size and shape of the flexible envelope 180, guarantees ideal properties to the envelope 180, in terms of elasticity to allow its deformation, and mechanical resistance to prevent its rupture during a fixing force. This material and the dimensioning of the casing 180 also guarantee a sufficient mechanical connection between the duct 150 and the bottom wall 102 of the base 100 of the electrical box and thus prevent separation of these two parts, in particular during a stress. tearing of the electrical box fixed to the receiving support 1. Of course, it is possible to adapt the material and the dimensioning of the casing 180, depending on the flatness defects of the receiving support 1 that the electrical box must be able to compensate.

In the second step of the first manufacturing process, shown on figure 7 , the physical link 156 is completely embedded in the flexible envelope 180. According to a variant not shown, it is conceivable that the physical link remains visible from inside the support plate, without being completely embedded in the flexible envelope. Anyway, as shown in the figure 8 , the physical link 156 obtained according to the first manufacturing process is of sufficiently small section to be able to be deformed together with the flexible envelope 180, where appropriate, during the displacement of the duct 150 relative to the bottom wall 102 of the base 100 (see figure 8 ).

In the second step of the second manufacturing process, shown on figure 10 , the physical link 156 is broken and the conduit 150 is advanced relative to the bottom wall 102 of the base 100 using a pin, until the internal end 151 of the conduit 150 is located at its final position, that is to say at a distance from the lowest portion of the internal face of the bottom wall 102 of the base 100. The flexible envelope 180 is then molded between the internal end 151 of the duct 150 and the bottom wall 102 of the base 100. The marks of breakage of the broken physical link 156 are visible on the bottom wall 102 obtained according to this second manufacturing process.

In addition to mechanically connecting each duct 150 to the bottom wall 102 of the base 100, the flexible casing 180 connects them in a sealed manner. This prevents any penetration of moisture inside the electrical box through the space separating said duct 150 from said bottom wall 102, this space being entirely filled by said flexible envelope 180.

In addition, as shown in the figures 2 to 5 , there is provided near the outer end 152 of each duct 150 a seal 185, here made of flexible material, intended to be crushed against the receiving support 1 during the fixing of the electrical box by the intermediary of the corresponding conduit 150. This seal 185 has the form of a lip which extends rearwardly from the pressure surface 155 of each duct 150. Here, the seal 185 externally borders the pressure surface 155 of the. conduit 150. The seal 185 thus has a generally annular shape with circular internal and external contours. Here, the free end of the seal 185 is arranged in the same plane as the bearing zones 120 of the bottom wall 102, before the fixing of the support plate 10 of the electrical box (see figure 3 ). The lip forming the seal 185 is flexible enough to be crushed so as to match the defects of the receiving support 1 when the electrical box is fixed to said receiving support 1. The seal 185 associated with each duct 150 reinforces thus the overall tightness of the electrical box by preventing moisture from entering the interior of the electrical box via the specific orifice 106 delimited by the conduit 150, since the seal 185 prevents humidity from penetrate between the pressure surface 155 of the duct 150 and the receiving support 1.

As shown in the figure 3 , the envelope 180 and the seal 185 are here produced by the same molding operation, so that they are formed in one piece.

As the figures 2 and 3 , it is also provided, over the entire periphery of the outer face 102B of the bottom wall 102 of the base 100, that is to say along the peripheral edge of said outer face 102B, a skirt 125 forming a surface of contact of the electrical box on the receiving support 1. This skirt 125 is here made of flexible material, for example of elastomeric material, and takes the form of a lip bordering the outer face 102B of the bottom wall 102. It is flexible enough to be crushed against the receiving support 1 when the electrical box is fixed to said receiving support. This crushing of the skirt 125 partly masks the flatness defects of the receiving support, since the skirt conforms to the shape of these defects. In addition, in a manner analogous to the seal carried at the outer end 152 of each duct 150, the skirt 125 reinforces the sealing of the electrical box by preventing moisture from entering between the outer face 102B. of its bottom wall 102 and the receiving support 1. Such a skirt 125 is for example made of SEBS material.

As the figures 2 and 3 , each duct 150 is closed at its outer end 152 by a sealing cap 153 made of tearable or pierceable material. This cover 153 can also be made of SEBS material. It is possible to screw the fixing screw 2 or insert any fixing element through this cover 153 to fix the electrical box on the receiving support 1. When the duct 150 is not used for fixing the the electrical box, this cap 153 keeps the outer end 152 of the conduit 150 closed, which reinforces the tightness of the electrical box.

On the figures 11 to 14 , there is shown a second embodiment of the electrical box according to the invention. The support plate 10 of the electrical box according to this second embodiment is similar to that of the electrical box according to the first embodiment described in that it comprises a base 200, a bottom wall 202 of which is crossed by conduits. 250 delimiting specific orifices 206 intended for fixing said support plate 10, and where a flexible casing 280 is interposed between each duct 250 and said bottom wall 202 of the base 200. The main difference between the support plate 10 of the electrical boxes according to the first and second embodiments resides in the fact that the base 200 and each conduit 250 of the support plate 10 of the electrical box according to the second embodiment are molded separately. Thus, the duct 250 can be made of a plastic material having mechanical characteristics different from those of the base 200, in particular better mechanical resistance. In addition, providing to separately mold each duct 250 and the base 200 of the support plate 10 allows a complexification of the shape of the duct 250 so as to incorporate additional functions therein.

According to this second embodiment, each envelope 280 of the support plate 10 belongs to the bottom wall 202 of the base 200 of the support plate 10, that is to say that each envelope 280 is overmolded on the wall of bottom 202 so that said bottom wall 202 and the casing 280 are in one piece, bi-material. The part comprising the bottom wall and the casing may optionally be formed from more than two materials if the bottom wall is itself formed from several different materials. The conduit 250 is then attached to the bottom wall 202 of the base 200 of the support plate 10, so that the casing 280 is interposed between said conduit 250 and the bottom wall 202 of the base 200.

More precisely, as shown in the figure 11 , the base 200 has locations, here two locations E arranged symmetrically with respect to the center of the bottom wall 202, each intended to receive a duct 250 such as that shown in FIG. figure 13 . As the figures 12 and 14 , each location E is here formed by a circular opening 230 passing right through the bottom wall 202 of the base 200. A sleeve 290 of flexible material, for example of SEBS material, is housed inside each opening 230.

Here, each sleeve 290 is overmolded in a single piece in the corresponding location E, that is to say that the sleeve 290 has just formed with the bottom wall 202 of the base 200. As shown in the figures. figures 12 and 14 , each sleeve 290 has a cylindrical shape. Each sleeve 290 is open at its front end and closed at its rear end by a tear-off cover 253. This sleeve 290 internally defines a cavity 284 of generally circular section, intended to receive the duct 250 (see figures 12 and 14 ). Each sleeve 290 is provided for this purpose with hooking means intended to cooperate retaining with complementary hooking means provided on each duct 250. Here, the side wall of the sleeve 290 internally carries two hooking teeth 291, in screw form. -with respect to a diameter of the circular section formed by the cavity 284 of the sleeve 290. The hooking surface of these hooking teeth 291 is perpendicular to the direction of introduction of the duct 250 into the cavity 284 of the sleeve 290. The hooking teeth 291 project towards each other generally halfway up the cavity 284 delimited by the sleeve 290 (see figures 12 and 14 ).

The sleeve 290 carries, at its front end, a ring which forms the flexible envelope 280 interposed between the duct 250 and the bottom wall 202 of the base 200 (see figure 14 ). This ring extends more precisely outside the cavity 284 delimited internally by said sleeve 290. The rear edge 280B of the ring rests on a sidewalk 230B projecting into the opening 230 of the base 200 (see figure 14 ). Outside the junction between the sidewalk 230B and the rear edge 280B of the crown, the section of the crown forming the flexible envelope 280 is generally less than that of the opening 230, so that the envelope 280 can move there by deformation (see figure 14 ).

The sleeve 290 finally carries, at the rear, beyond the cap 253 closing the cavity 284, a seal 285 in the form of a lip (see figure 14 ), similar to the seal 185 of the base 100 of the first embodiment described above. When fixing the electrical box via the conduit 250, a pressure surface 255 of the conduit 250 bears indirectly against the receiving support 1, part of the cover 253 being interposed, in a compressible manner, between said pressure surface 255 and the receiving support 1 (see figure 14 ). During this fixing, the seal 285 is compressed against the receiving support 1 and conforms to its defects.

As shown in the figure 13 , each duct 250 is in the form of a generally cylindrical sleeve, the section of which has a generally circular outer contour and a generally oblong inner contour. The duct 250 internally delimits one of the specific orifices 206 with a generally oblong section, intended to receive the fixing screw for fixing the support plate 10 to the receiving support 1. At its front end, this sleeve is flared to delimit the housing. receiving the screw head. The front end of the duct 250 is also surmounted on the outside by a collar 262, here provided at a distance from the front edge of said duct 250. The duct 250 carries notches 257 on the outside, arranged symmetrically with respect to the main direction of the oblong. formed by the section of the specific orifice 206 delimited by the duct 250. These notches 257 are intended to receive the hooking teeth 291 of the sleeve 290 when the duct 250 is fitted in said sleeve 290 of the base 200 (see figure 14 ). The outer section of the duct 250 is greater than that of the cavity 284 delimited by the sleeve 290 so that when the duct 250 is inserted in the cavity 284 of the sleeve 290 of the base 200, a permanent lateral pressure is exerted between the duct 250 and the sleeve 290. This permanent pressure ensures the seal between these two parts.

More precisely, as shown in the figure 14 , when the conduit 250 is attached to the base 200, the hooking teeth 291 of the sleeve 290 deform until they bite the notches 257 of the conduit 250, the outer end 252 of the conduit 250 is then in abutment against the cover 253 of the sleeve 290, and the flange 262 of the duct 250 rests on the front edge of the crown forming the flexible envelope 280. The flexible envelope 280 is then sandwiched between, at the front, the collar 262, and, at the rear, the sidewalk 230B. The flange 262 provides better mechanical resistance to the duct 250 and presses on the flexible casing 280 to deform it when a fixing force is exerted by the screwing of the fixing screw 2 in the duct 250. This deformation of the flexible envelope 280 allows the translation of the pressure surface 255 of the duct 250 relative to the bearing zone of the bottom wall 202 of the support plate 10.

As shown in the figure 14 , provision is made here to attach to the internal end 251 of the duct 250, opposite to the external end 252, a protective plug 254. The protective plug 254, generally attached to the pipe 250 after a screw of fixing has been inserted therein, reinforces the tightness of the electrical box and the electrical insulation of the electrical elements housed in this electrical box. To keep this protective cap 254 in place, the front edge of the duct 250 is occasionally provided with two flanges 259 with hooking teeth directed towards the outside of the duct 250 (see figures 13 and 14 ), symmetrical with respect to the main axis of the oblong formed by the specific orifice 206 that the duct 250 delimits internally. These two flanges 259 are intended to retain two tabs 254A of the protective cap 254 (see figure 14 ). Here, the protective cap 254 is made of a flexible material, of the SEBS type, so that it deforms to allow the tabs 254A to catch behind the flanges 259.

Finally, as shown in figure 13 , there are provided on the duct 250 four tabs 260 projecting radially from the collar 262. Each of these tabs 260 is intended to engage in a corresponding longitudinal groove 231 extending from front to rear along each opening 230 of the back wall 202 (see figure 12 ). These tabs 260 engaged in the grooves 231 form anti-rotation notches of the duct 250 so that when the fixing screw 2 is screwed into the duct 250, it does not cause the rotation of the duct 250.

For the rest, the support plate 10 of the electrical box according to the second embodiment of the invention is in all respects identical to the support plate 10 of the electrical box according to the first embodiment of the invention.

We have represented on the figure 15 a third embodiment of the electrical box according to the invention. This third embodiment is very similar to the second embodiment of the electrical box according to the invention, in particular insofar as a base 300 of the support plate 10 of the electrical box according to this third embodiment is molded separately from each conduit 350 of this support plate 10, where a flexible envelope 380 belongs to a bottom wall 302 of said base 300 of this support plate 10, and where each conduit 350 is attached to the bottom wall 302 by means of a sleeve 390 provided in an opening of the bottom wall 302 of the base 300, said sleeve 390 carrying the flexible envelope 380. The only difference with the second embodiment lies in the fact that the reciprocal hooking means between the sleeve 390 and the duct 350 are reversed. More precisely, as shown in the figure 15 , the conduit 350 of the third embodiment is provided with two hooking teeth 357 intended to hook into corresponding notches 391 provided in a cavity delimited internally by the sleeve 390 of this third embodiment. Apart from this difference, the support plate 10 of the electrical box according to the third embodiment is identical to the support plate 10 of the electrical box according to the second embodiment. In particular, the sleeve 390 forms in a single piece the flexible envelope 380, a seal and a tear-off cover (not visible on the figure 15 ).

On the figures 16 and 17 , there is shown a fourth embodiment of the electrical box according to the invention. This fourth embodiment is similar to the second and third embodiments of the electrical box according to the invention, in particular insofar as a base 400 of the support plate 10 of the electrical box according to this fourth embodiment is molded separately. of each conduit 450 of this support plate 10, where openings 430 are provided in a bottom wall 402 of said base 400 to receive said conduits 450, and where a flexible envelope 480 is interposed between each conduit 450 and the bottom wall 402 of the base 400 of this support plate 10. The difference with the second and third embodiments of the electrical box according to the invention lies in the fact that the flexible envelope 480 this time belongs to the conduit 450, that is to say say that the flexible envelope 480 is overmolded with the duct 450 so as to be in one piece with said duct 450.

As the figures 16 and 17 , the conduit 450 is similar to the conduits 250; 350 of the second and third embodiments of the electrical box according to the invention insofar as it is in the form of a cylindrical sleeve, internally delimiting one of the specific orifices 406 of oblong section intended for fixing the support plate 10, the front end of duct 450 being surmounted by a circular collar 462. Unlike conduits 250; 350 of the second and third embodiments of the electrical box according to the invention, the side wall of the duct 450 has neither hooking teeth, nor notch for its attachment to the base 400, but a ring 483 is provided for retained in flexible material, overmolded at an outer end 452 of the duct 450 and intended to be hooked to the bottom wall 402 of the base 400. This retaining ring 483 is here generally annular with a circular section.

As shown in the figure 17 , this retaining ring 483 is intended to hang behind a sidewalk 433 projecting into the opening 430 of the bottom wall 402 of the base 400 (see figure 16 ) intended to receive the conduit 450. This sidewalk 433 here borders the wall delimiting this opening 430 for receiving the conduit 450 and extends overall to a third of the height of this wall. As shown in the figure 17 , the free edge of the sidewalk 433 of the bottom wall 402 of the base 400 forms a slope so that the section of the opening 430 at the level of the front face of the sidewalk 433 is greater than the section of the opening 430 at the level of the rear face of the sidewalk 433. In addition, the free edge of the sidewalk 433 is dropped so that it forms a ledge 435 (see figures 16 and 17 ), behind the rear face of which the front face of the ring 483 is retained when the duct 450 is inserted in the opening 430.

When the duct 450 is inserted in the opening 430 of the bottom wall 402 of the base 400, the free edge of the retaining ring 483, of slope complementary to that of the free edge of the sidewalk 433, slides against said free edge of the sidewalk 433 , so that the retaining ring 483 is forced to retract towards the interior of the duct 450 (see figure 17 ). Once the protuberance of the sidewalk 433 has passed, the retaining ring 483 returns to its initial position and its front face is then retained behind the rear face of the edge 435 of the sidewalk 433.

According to this fourth embodiment, the assembly of the conduit 450 in the bottom wall 402 is facilitated because the elastomeric material of the retaining ring 483 slides against the rigid plastic material of the bottom wall 402 of the base 400.

The rear edge of the ring 483 forms a seal 485 (see figures 16 and 17 ) intended to be compressed against the receiving support when fixing the electrical box via the conduit 450, in the manner of the seal of the first, second and third embodiments.

According to this fourth embodiment, a cylindrical crown of circular section is provided (see figure 16 ) which extends towards the rear in the extension of the flange 462 of the duct 450 (see figure 17 ). This ring forms the flexible envelope 480 intended to be interposed between the duct 450 and the bottom wall 402 of the base 400 to allow the relative movement of one with respect to the other. More precisely, when the duct 450 is fixed in the opening 430, the ring forming the flexible envelope 480 is sandwiched between, at the front, the collar 462 of the duct 450, and, at the rear, the face front of sidewalk 433 (see figure 17 ) against which it stumbles. The collar 462 of the duct 450 makes it possible to press on the crown forming the flexible envelope 480 to deform it when a screwing force is exerted in the duct 450.

As in the second and third embodiments of the electrical box according to the invention, a tear-off cover 453 closes the outer end 452 of the conduit 450 (see figure 17 ). When fixing the electrical box via the conduit 450, a pressure surface 455 of the conduit 450 bears indirectly against the receiving support 1, a part of the cover 453 being interposed in a compressible manner between said pressure surface 455 and the receiving support 1.

For the rest, the support plate 10 of the electrical box according to the fourth embodiment of the invention is in all respects identical to the support plate 10 of the electrical box according to the second and third embodiments of the invention. .

On the figures 18 and 19 , there is shown a fifth embodiment of the electrical box according to the invention. This fifth embodiment is similar to the fourth embodiment, in particular insofar as a base 500 of the support plate 10 is molded separately from each duct 550 of this support plate 10, where openings 530 are provided in a wall of bottom 502 of said base 500 to receive said conduits 550, and where a flexible casing 580 belongs to each conduit 550 and is interposed between said conduit 550 and the bottom wall 502 of base 500. The difference with the fourth embodiment lies in the fact that the reciprocal hooking means between the duct 550 and the bottom wall 502 of the base 500 are carried by the duct 550 itself.

According to this fifth embodiment, it is not a retaining ring bordering the outer end of the duct which provides the mechanical connection between said duct and the base of the support plate 10, but the duct 550 itself which carries means for attaching to the base 500 of the support plate 10.

More precisely, as shown in the figure 18 , the bottom wall 502 of the base 500 forms a sidewalk 533 projecting inside each opening 530 so as to border, at the rear, said opening 530. This sidewalk 533 carries retaining teeth 537 projecting radially towards inside the opening 530. Each duct 550 is in the form of a generally cylindrical sleeve, internally delimiting one of the specific orifices 506 with an oblong section intended for fixing the support plate 10. Notches 557 longitudinal are provided on the outer face of the side wall of the duct 550. Flanges 559 disposed at the rear of said duct 550 stop each of these longitudinal notches 557.

Thus, when the duct 550 is introduced into the corresponding opening 530 of the base 500, the flanges 559 of the duct 550 press on the retaining teeth 537 of the sidewalk 533 and force them to bend backwards to allow passage to said duct 550. When each flange 559 has passed each retainer tooth 537, each retainer tooth 537 returns to its original position so that the front face of each flange 559 is retained behind the rear face of the corresponding retainer tooth 537, thereby preventing displacement. from duct 550 to the front (see figure 19 ).

For the rest, as in the fourth embodiment, the front end of the duct 550 is surmounted on the outside by a collar 562 in the rear extension of which extends a ring forming the flexible casing 580 (see figure 19 ). Thus, as in the fourth embodiment, the flexible casing 580 is overmolded with the conduit 550 so as to be in one piece with said conduit 550. When the conduit 550 is mounted in the base 500, the casing 580 flexible is sandwiched between, at the front, the flange 562 of the duct 550, and, at the rear, the front face of the sidewalk 533 (see figure 19 ). The flange 562 of the duct 550 makes it possible to press on the crown forming the flexible casing 580 to deform it when a screwing force is exerted in the duct 550. The longitudinal notches 557 provided on the external face of the side wall of the duct 550 allow movement of the teeth 537 for retaining the sidewalk 533 so as not to hinder the movement of said duct 550 during the deformation of the flexible casing 580 by a clamping force. In addition, the annular section of the flexible casing 580 is greater than that of the opening 530 provided in the bottom wall 502 of the base 500, so that a permanent lateral pressure is exerted between the flexible casing 580 and the back wall 502. This permanent lateral pressure seals the electrical box by preventing moisture from entering the interior of the electrical box via the opening 530.

As shown in the figure 19 , a rear end 552 of the duct 550 is closed by a tear-off cover 553. When fixing the electrical box via the duct 550, the pressure surface 555 of the duct 550 bears indirectly against the receiving support 1 , a portion of the cap 553 being interposed in a compressible manner between said pressure surface 555 and the receiving support 1. The cap 553 is bordered, at the rear, by a seal 585 in the form of a lip ( see figures 18 and 19 ), similar to the seal 185 of the base 100 of the electrical box according to the first embodiment described above.

For the rest, the support plate 10 of the electrical box according to the fifth embodiment of the invention is in all respects identical to the support plate 10 of the electrical box according to the fourth embodiment of the invention.

In the second, third, fourth and fifth embodiments, it was considered that only two of the specific fixing holes of the support plate were formed by two conduits separated from the bottom wall of the base by a flexible envelope forming a system of compensation of flatness defects of the receiving support. Of course, it is quite conceivable to provide for each specific orifice, in particular the four specific orifices, to be formed by a duct provided with such a compensation system.

In the second, third, fourth and fifth embodiments of the electrical box according to the invention, the seal 285; 385; 485, the gate 253; 353; 453 tearable and the envelope 280; 380; 480 flexible are formed in one piece. We can see, on the one hand, on the figure 17 the links 489 of flexible material materializing the passage used for filling the mold during the overmolding of these parts on the duct 450, and, on the other hand, on the figure 18 the location 589 provided on the conduit 550 for this passage of material during the overmolding. As a variant, it could be envisaged that each of these elements (flexible envelope, tear-off cover and sealing gasket) are separate pieces attached or overmolded separately on the base and / or on each duct of the support plate.

In the various figures, the electrical box has a square-shaped section and it defines a single station making it possible to accommodate one or two electrical equipment mechanisms: it is said that this is a single-station box.

As a variant, it could be a multi-station box, having a section of rectangular shape and defining two or three stations. In this variant, the electrical box will preferably include a frame defining several openings, each being intended to receive a station.

Claims (16)

Electrical box (1000) made of rigid plastic material comprising a bottom wall (102; 202 302; 402; 502) intended to be fixed on a receiving support (1), this bottom wall (102; 202; 302; 402) ; 502) having on an external face (102B) at least one bearing zone (120) on said receiving support (1) and being crossed by at least one duct (150; 250; 350; 450; 550) intended for receiving a fastening element (2) to said receiving support (1), each duct (150; 250; 350; 450; 550) having at an outer end (152; 252; 452; 552), a pressure surface ( 155; 255; 455; 555) on said receiving medium (1),
characterized in that it comprises at least one envelope (180; 280; 380; 480; 580) of flexible material surrounding each duct (150; 250; 350; 450; 550) so that the envelope (180; 280; 380; 480; 580) is interposed between said bottom wall (102; 202; 302; 402; 502) and said duct (150; 250; 350; 450; 550) to allow a relative translational movement of the surface of pressure (155; 255; 455; 555) of each duct (150; 250; 350; 450; 550) with respect to each bearing zone (120) of the bottom wall (102; 202; 302; 402; 502 ), without generating any mechanical stress deforming said bottom wall (102; 202; 302; 402; 502). An electrical box (1000) according to claim 1, in which each envelope (180; 280; 380; 480; 580) is made of an elastomeric material. Electrical box (1000) according to one of claims 1 to 2, in which there is provided along the peripheral edge of the outer face (102B) of the bottom wall (102) a skirt (125) forming a surface of support on the reception support (1). Electrical box (1000) according to one of claims 1 to 3, in which the external face (102B) of the bottom wall (102) forms at least one relief, one zone of which constitutes said bearing zone (120) of the bottom wall (102), the pressure surface (155) of each duct (150) being set back from this bearing zone (120) before fixing the electrical box. Electrical box (1000) according to one of claims 1 to 4, in which at least two conduits (150; 250; 350; 450; 550) are provided for receiving fixing elements (2) arranged symmetrically. relative to the center of the bottom wall (102; 202; 302; 402; 502) of the electrical box (1000). Electrical box (1000) according to claim 5, in which each of the two conduits (150; 250; 350; 450; 550) internally defines a specific orifice (106; 206; 406; 506) of oblong section, the main directions of these oblong sections being oriented at 90 ° to each other. Electrical box (1000) according to one of claims 1 to 6, in which there is provided a seal (185; 285; 485; 585) of flexible material extending from the pressure surface (155; 255; 455; 555) of the conduit (150; 250; 450; 550) and able to be compressed against said receiving support (1) when fixing the electrical box. Electrical box (1000) according to one of claims 1 to 7, in which each duct (150; 250; 450; 550) is closed at its outer end (152; 252; 452; 552) by a cover (153; 253) ; 453; 553) in tearable material. Electrical box (1000) according to one of claims 7 and 8; wherein the casing (180; 280; 480; 580), the gasket (185; 285; 485; 585) and the gate (153; 253; 453; 553) are integrally molded from elastomeric material. Electrical box (1000) according to one of claims 1 to 9, in which provision is made to connect to an internal end (251) of the duct (250), opposite to said external end (252) of said duct (250), a protective cap (254). Electrical box (1000) according to one of claims 1 to 10, in which each casing (180) is molded onto the corresponding conduit (150) and the bottom wall (102). Electrical box (1000) according to one of claims 1 to 10, in which each duct (250; 350; 450; 550) is attached to the bottom wall (202; 302; 402; 502). An electrical box (1000) according to claim 12, in which each envelope (280; 380) belongs to the bottom wall (202; 302). An electrical box (1000) according to claim 12, wherein each envelope (480; 580) belongs to the conduit (450; 550). Box comprising an electrical box (1000) according to one of claims 1 to 14, in which there is provided a cover (4A, 4B) to be attached to the front of said electrical box (1000). Electrical apparatus comprising an apparatus mechanism (3A, 3B) and a cover (4A, 4B), characterized in that it comprises an electrical box (1000) according to one of claims 1 to 14 inside which is fixed the gear mechanism (3A, 3B) and to the front of which is fixed the cover (4A, 4B).

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